Sildigra is generally a brand name for sildenafil citrate, a medication commonly used to treat erectile dysfunction (ED) in men. Standard doses of sildenafil are typically 25 mg, 50 mg, or 100 mg, and these doses are prescribed based on individual needs and tolerances. If there is a Sildigra 250 mg formulation, it would be considered an exceptionally high dose. Such high doses of sildenafil should only be taken under the direct supervision and prescription of a healthcare professional due to the increased risk of potential side effects and complications.